Pre-requirements: PC with Windows ; Lenovo ZUK Z2 Pro ; Connection cable USB ; adb / fastboot HERE ; Installation adb / fastboot: Go here to download the ' SDK of Android ; Proceed to install the files. Unlock the Bootloader: From your device go to " About -> ZUI version" , scroll down and click " build number " continuously until a message will not be shown on the screen; Go back to your "Menu Settings " and go to " Advanced settings / Developers Option ", scroll, then, down by activating the debug USB ; Go back to the menu Settings / About / Status Write down your serial number of z2 is 6 digits (Serial number) Connect your phone to your PC via cable USB ; Remember to accept the RSA key by flagging them off as soon as you see the message on the phone; Go to the directory folder Fastboot / ADB , hold the "key Shift ", click with the right button of themouse and then again click " Open Command Window Here "; To test the connection to the device (must appear the S / N ), the terminal window you just opened, type: adb devices Start the mode bootloader or fastboot . To do this, you can run the command code, while the device is connected to the PC: adb reboot bootloader Now, the ZUK Z2 is not recognized as a device, you must specify the ' id OEM . The code is "-i 0x2b4c ", any command fastboot must be suffixed with the following code: -i 0x2b4c Now, go to this site: http://developer.zuk.com/bootloader Place your SN and add two zeros "00" at the end , then wait for the email from ZUK. Check SPAM and other folders as required incase it does not hit your inbox. Copy the files unlock_bootloader.img in adb directory Now type the command for unlocking: fastboot -i 0x2b4c flash unlock unlock_bootloader.img Once you get the confirmation message, you have to type the following command ( which will format your internal memory ): fastboot -i 0x2b4c oem unlock-go You can disconnect the cable USB Credits: http://www.zukfans.it/2016/07/10/guida-come-sbloccare-il-bootloader-su-lenovo-zuk-z2/ thanks guys Notes: Flashing the bootloader wipes all userdata! BACKUP FIRSTLY!!!!